10.5 Voltage differential protection VDCPTOV
10.5.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage differential protection VDCPTOV - 60
10.5.2 Application
The Voltage differential protection VDCPTOV functions can be used in some
different applications.
• Voltage unbalance protection for capacitor banks. The voltage on the bus is
supervised with the voltage in the capacitor bank, phase- by phase. Difference
indicates a fault, either short-circuited or open element in the capacitor bank. It is
mainly used on elements with external fuses but can also be used on elements
with internal fuses instead of a current unbalance protection measuring the
current between the neutrals of two half’s of the capacitor bank. The function
requires voltage transformers in all phases of the capacitor bank. Figure
210
shows some different alternative connections of this function.
1MRK 502 071-UEN - Section 10
Voltage protection
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 425
Application manual
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